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CVE-2025-8291

Estado: AplazadaMedia (4.3)—

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations.

Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Python — ZipfileAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-8291",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-8291",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-10-29T15:15:06.403842Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cna@python.org",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cna@python.org",
      "affectedData": [
        {
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "product": "CPython",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.9.24",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.10.0",
              "lessThan": "3.10.19",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.11.0",
              "lessThan": "3.11.14",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.12.0",
              "lessThan": "3.12.12",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.13.0",
              "lessThan": "3.13.10",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.14.0",
              "lessThan": "3.14.1",
              "versionType": "python"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-10-07T18:16:00.317",
  "references": [
    {
      "url": "https://github.com/python/cpython/commit/162997bb70e067668c039700141770687bc8f267",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/333d4a6f4967d3ace91492a39ededbcf3faa76a6",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/76437ac248ad8ca44e9bf697b02b1e2241df2196",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/8392b2f0d35678407d9ce7d95655a5b77de161b4",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/bca11ae7d575d87ed93f5dd6a313be6246e3e388",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/d11e69d6203080e3ec450446bfed0516727b85c3",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/issues/139700",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/pull/139702",
      "source": "cna@python.org"
    },
    {
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/QECOPWMTH4VPPJAXAH2BGTA4XADOP62G/",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/google/security-research/security/advisories/GHSA-hhv7-p4pg-wm6p",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    },
    {
      "url": "https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2025-12.json",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1285"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The 'zipfile' module would not check the validity of the ZIP64 End of\nCentral Directory (EOCD) Locator record offset value would not be used to\nlocate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be\nassumed to be the previous record in the ZIP archive. This could be abused\nto create ZIP archives that are handled differently by the 'zipfile' module\ncompared to other ZIP implementations.\n\n\nRemediation maintains this behavior, but checks that the offset specified\nin the ZIP64 EOCD Locator record matches the expected value."
    }
  ],
  "lastModified": "2026-07-31T14:16:45.617",
  "sourceIdentifier": "cna@python.org"
}